Any good web developer knows that you can’t rely on JavaScript to provide core site functionality. For now we still have to worry about that ever-shrinking group of users who either turn off JavaScript in their browser or who are using a browser which doesn’t support JavaScript. This is always an issue when developing for the modern web because you want to provide users with the snazzy effects and interfaces they have come to expect, but you still want your site to work without them. Much has been written about graceful degradation and its kinder sibling progressive enhancement (I particularly like this article). Both techniques offer sound principles for building fancy sites that still work without client-side scripting. However, both typically rely only on the user agent to let the web application know the browsing environment. In fact there is a human right there who can tell you better what they would like their experience to be. That’s why I like to use a little technique called “ask the user” to address the JavaScript problem. It’s not as serious sounding as those other two techniques, but I think it’s a happy medium. Here’s how it works.
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